Leading 1-up and with Kerr facing a 10-foot birdie attempt on the par-5 18th, Pettersen curled in a left to-right 15-footer for birdie to seal the victory on the cold, damp overcast day that probably made the 30-year-old Norwegian star fell as if she was back home.

Pettersen immediately thrust both hands skyward in celebration, took a few steps and staggered to her knees in exhaustion after playing four rounds over the last two days. She quickly got up and gave a thumbs up and exhaled.

Pettersen, who beat top-seeded Na Yeon Choi of South Korea 4 and 2 in the semifinals Sunday morning, never trailed in the match in winning for the first time since the Canadian Women’s Open in September 2009, and for the seventh time in her LPGA Tour career.

It also ended a run of seconditis. The No. 3 ranked woman finished second six times last year and 12 times since 2007, a year she won five times, including the LPGA Championship.

The No. 4 Kerr, who won the final two holes in beating Angela Stanford 1-up in the semis, had her putter to blame for failing to win for the 15th time on tour. The American missed four putts of less than 10 feet — all for hole victories.

However, she also made a 3-foot par save on No. 16 to keep the match alive and a 10-footer for birdie on the next hole to cut Pettersen’s lead to 1-up.

Pettersen ended the run and the match with her dramatic putt at the magical 18th hole. She played it four times and birdied it every time to win matches. She dispatched Natalie Gulbis in the first round, Stacy Lewis in the round of 16, Yani Tseng in the quarterfinals and Kerr in the championship.

Pettersen earned $375,000, and Kerr made $225,000.

Pettersen birdied the second and fourth holes to go 2-up, but Kerr tied the match with birdies at the fifth and eighth holes. Pettersen made a 15-foot birdie putt at No. 9 to take a 1-up lead.

The back nine of the championship match was both heartbreaking and ugly at times.

Kerr lipped out on a 10-footer for birdie at No. 10 and then the players halved the 11th and 12th holes with bogeys. Pettersen missed a 5-foot par-saver at the 11th to win the hole and Kerr did the same at the next hole from 4 feet.

Kerr had another chance to tie the match at No. 14 but her 10-foot birdie putt burned the cup.

Pettersen went 2-up at the par-4 15th. Kerr was right with her second shot, chipped 10 feet past the hole and then missed the par save. Pettersen then extended the lead making a 5-footer for par.

Kerr rallied but Pettersen would not be denied.

Choi, who never made it to 18 against Pettersen, shot 4 under to open a 5-up lead over Stanford in the consolation match en route to a 4-and-3 win that earned her $150,000. Stanford, who had to be disappointed after throwing away a great chance to be beat Kerr at No. 18 in the semifinal settled for $112,500.

Stanford, who finished second to Sun Young Yoo last year, is going to have nightmares about her third shot at the par-5, 515-yard 18th hole.

Kerr square the match with a short birdie at No. 17 but her third at the final hole sucked off the front of the elevated green.

Stanford hit her third shot over the green and the mistake was compounded when it landed in a downhill line with mud under the ball. The No. 18 seed, searched for a way to land the ball on the green and considered all angles before going at the pin. However, the ball came out hot and rolled down the front of the raised green, landing almost where Kerr’s third shot had stopped.

Kerr had hit her fourth to 3 feet, so Stanford went at the pin and the ball banged off it. Kerr then made her par putt from 5 feet to win the match.